
TE
CH
tm
Nch-MOS-FET are in “ON” state. 
When VM pin voltage is going up to a value 
between the short protection voltage Vshort and 
excess current threshold Vdet3, the excess 
current detector operates and further soaring of 
VM pin voltage higher than Vshort makes the 
short circuit protector enabled. As a result the 
external discharge control Nch-MOS-FET turns 
to “OFF” with Dout pin being at “L”. 
An output delay time for the excess current 
detector is internally fixed, about 13ms TYP. At 
VDD=3V. A quick recovery of VM pin level 
from a value between Vshort and Vdet3 within 
the delay time keeps the discharge control FET 
staying “ON” state. When the short circuit 
protector is enabled, the Dout would be “L” and 
its delay time would be 5us TYP. 
Application Circuits 
  T63H0001A
TM Technology Inc. reserves the right
P. 6  
to change products or specifications without notice.  
Publication Date:MAR. 2004 
Revision:A
The VM pin has a built-in pull down resistor, 
TYP. 100K Ohm, connected to the VSS pin. 
After an excess current or a short circuit 
protection is detected, removing a cause of 
excess current or external short circuit makes an 
external discharge control Nch-MOS-FET to an 
“ON” state automatically with the VM pin level 
being down to the VSS level through the built-in 
pull down resistor. 
When VDD voltage is higher than Vdet2 at a 
time when the excess current is detected the 
T63H0001A does not enter a standby mode, 
while VDD voltage is lower than Vdet2 the 
T63H0001A enters a standby mode. After 
detecting short circuit the T63H0001A will not 
enter a standby mode. 
5 VDD 
6 VM 
C3 
0.01uf 
C2 
0.1uF 
R2 
1K 
2 Ct 
3 VSS 
4 
Dout 
1  
Cout 
C2 0.1uF 
R1=100Ohm 
T63H0001A